August 2003 19 KS8737
KS8737 Micrel
Absolute Maximum Ratings (Note 1)
Supply Voltage (V
DD
) .................................................+4.0V
Supply Reference to GND........................... –0.5V to +7.0V
Input Voltage (All Inputs)............................. –0.5V to +4.0V
Output Voltage (All Outputs) ....................... –0.5V to +4.0V
Lead Temperature (soldering, 10 sec.) ..................... 270°C
Storage Temperature (T
S
) ....................... –55°C to +150°C
Operating Ratings (Note 2)
Supply Voltage (V
DD
) .......................... +3.135V to +3.465V
Ambient Temperature (T
A
) ............................. 0°C to +70°C
Package Thermal Resistance, (Note 3)
TQFP (θ
JA
) No Air Flow ...................................53.7°C/W
Electrical Characteristics (Note 4)
V
DD
= 3.3V ±5%; T
A
= 0°C to +70°C; unless noted.
Symbol Parameter Condition Min Typ Max Units
Total Supply Current (including TX output driver current)
I
DD1
Normal 100BaseTX 100 120 mA
I
DD2
Normal 10BaseT (50% utilization) 135 150 mA
I
DD3
Power Saving Mode 100BaseTX 80 90 mA
I
DD4
Power Save Mode 10BaseT 40 45 mA
I
DD5
Power Down Mode 910mA
TTL Inputs
V
IH
Input High Voltage 2.0 V
V
IL
Input Low Voltage 0.8 V
I
IN
Input Current V
IN
= GND ~ V
DD
–10 10 µA
TTL Outputs
V
OH
Output High Voltage I
OH
= –4mA 2.4 V
V
OL
Output Low Voltage I
OL
= 4mA 0.4 V
|I
OZ
| Output Tr-State Leakage 10 µA
100BaseTX Receive
V
B
RXP/RXM Input Bias Voltage 2.7 V
R
IN
RXP/RXM Differential Input 8 kΩ
Resistance
Propagation Delay from magnetics to RDTX 50 110 ns
100BaseTX Transmit (measured differentially after 1:1 transformer)
V
O
Peak Differential Output Voltage 50Ω from each output to V
DD
0.95 1.05 V
V
IMB
Output Voltage Imbalance 50Ω from each output to V
DD
2%
t
r
, t
t
Rise/Fall Time 35ns
Rise/Fall Time Imbalance 0 0.5 ns
100BaseTX Transmit (measured differentially after 1:1 transformer)
Duty Cycle Distortion ±0.5 ns
Overshoot 5%
V
SET
Reference Voltage of ISET 1.25 V
Propagation Delay from TDTX to magentics 45 60 ns
Jitters 0.7 1.4 ns
(pk-pk)
Note 1. Exceeding the absolute maximum rating may damage the device.
Note 2. The device is not guaranteed to function outside its operating rating. Unused inputs must always be tied to an appropriate logic voltage level
(Ground to V
DD
).
Note 3. No HS (heat spreader) in package.
Note 4. Specification for packaged product only.
